High-temperature-resistant sensor cable

Abstract

The utility model relates to the technical field of cables, and discloses a high-temperature-resistant sensor cable, which comprises oxygen-free copper conductors, an insulating layer and a sheath, a plurality of wire core groups are arranged in the sheath in an annular array, each wire core group comprises a sub-shielding layer, at least two oxygen-free copper conductors are wrapped in the sub-shielding layer, and the oxygen-free copper conductors are arranged in the insulating layer. The insulating layer is made of polypropylene and is extruded outside the oxygen-free copper conductor, a fireproof layer is filled between the insulating layer and the sub-shielding layer, the wire core group is jointly coated with a mica wrapping tape, a gap between the insulating layer and the mica wrapping tape is filled with a supporting layer, the mica wrapping tape is externally provided with a metal tape with a shielding function, and the metal tape is externally provided with a shielding layer. And the sheath outside the metal belt is made of fluoroplastic capable of resisting high temperature of 200 DEG C. Compared with the prior art, the utility model has the advantages that a certain bending radius is allowed during installation, so that an installation circuit can be adjusted, and polypropylene insulation is more environment-friendly and energy-saving.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field, specifically point to a kind of high-temperature sensor cable. BACKGROUND

[0002] The structure of sensor cable mainly includes conductor, insulating layer, shielding layer and sheath layer several parts;Among them, the conductor of sensor cable is usually copper wire or aluminum wire, and can be single-core or multi-core structure according to needs. In order to reduce electromagnetic interference, the outer layer of cable is usually wrapped with shielding layer, such as conductive cloth, braided copper mesh or copper po, etc., which can effectively shield external electromagnetic interference and ensure stable transmission of signal.

[0003] However, the existing high-temperature sensor cable is inconvenient to bend due to the armor shielding composed of external metal belt, so that it is usually straight during laying and installation, and cannot adjust the installation line according to needs. Moreover, the insulating layer of the existing high-temperature sensor cable is usually made of polyethylene material, which can ensure its insulation performance, but polyethylene needs to be crosslinked, which is complex in process and inconvenient for environmental protection. UTILITY MODEL CONTENT

[0004] I. Technical problems to be solved

[0005] The technical problem to be solved by the utility model is that the high-temperature sensor cable is inconvenient to bend during laying and installation, cannot adjust the installation line according to needs, and the polyethylene insulating layer needs to be crosslinked, which is complex in process and inconvenient for environmental protection.

[0006] II. Technical scheme

[0007] To solve the above technical problems, the utility model provides a technical scheme of a high-temperature sensor cable, which comprises oxygen-free copper conductor, insulating layer and sheath, the sheath is arranged with a plurality of wire core groups in annular array, the wire core group comprises a sub-shielding layer, the sub-shielding layer is covered with no less than two groups of oxygen-free copper conductor, the insulating layer is made of polypropylene material and is extruded on the outside of oxygen-free copper conductor, the insulating layer and the sub-shielding layer are filled with fireproof layer, the wire core group is collectively covered with low-smoke halogen-free high-flame-retardant tape wrapping outside, the gap between the sub-shielding layer and the low-smoke halogen-free high-flame-retardant tape wrapping is filled with support layer, the low-smoke halogen-free high-flame-retardant tape wrapping is provided with metal belt with shielding function outside, and the sheath outside the metal belt is fluoroplastic that can withstand 200℃ high temperature.

[0008] Further, the sub-shielding layer is a braided belt made of stainless steel or copper material, the sub-shielding layer has a covering rate of not less than 90%, the sub-shielding layer formed by the braided belt made of stainless steel or copper material can filter external signals, and when the cable is damaged in use, the shielding layer can guide the leaked current to the grounding wire, thereby achieving a certain safety protection effect; in addition, the cable can have a certain bending radius during installation.

[0009] Further, the metal belt is a copper belt or a stainless steel belt, and the outer wall of the metal belt is provided with a threaded groove, so that the cable can have a certain bending radius during installation on the basis of realizing external signal shielding by the metal belt with the threaded groove.

[0010] Further, the fireproof layer is magnesium oxide powder, and the magnesium oxide has chemical stability, insulation performance and fire resistance, so that the conductive performance of the cable under high temperature is reduced, the safety performance of the cable is improved, the normal work of the wire and cable is ensured, and the wire and cable are prevented from being easily exploded or on fire due to heat.

[0011] Further, the supporting layer comprises a non-metallic central reinforcing member arranged at the center of the wire core group, and a filler is arranged in the gap between the adjacent sub-shielding layer and the low-smoke halogen-free high-flame-retardant belt, the filler is any one of a polypropylene rope, a glass fiber rope or an asbestos rope, the non-metallic central reinforcing member facilitates supporting the wire core group, and the polypropylene rope, the glass fiber rope or the asbestos rope is non-hygroscopic and non-conductive, and has water resistance and fire resistance in the case of ensuring the roundness of the cable.

[0012] Further, the non-metallic central reinforcing member is provided with a through hole through which cooling liquid can pass, so that the cable temperature can be reduced by providing cooling liquid into the cable in the case that the cable is at high temperature, thereby realizing higher transmission efficiency and improving communication services.

[0013] III. Advantages

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] The conductor can realize data communication, the polypropylene insulation layer can isolate the conductor, has excellent electrical insulation performance, has a higher dielectric coefficient, and increases with the increase of temperature, and has a very high breakdown voltage, and compared with the traditional polyethylene insulation layer, does not need to be crosslinked, so that the process is simpler, reduces the emission of carbon dioxide, and is more environmentally friendly and energy-saving, the fireproof layer is arranged, the chemical stability, insulation performance and fire resistance of the material are utilized, the electrical conductivity of the cable under high temperature is reduced, and the safety performance of the cable is improved, the double shielding layer and the metal strip are arranged, the external signal is shielded, and interference on the communication of the oxygen-free copper conductor is avoided, the support layer is arranged, the cable is more round and stable in structure, and the impact resistance and extrusion resistance of the cable are improved, the low-smoke halogen-free high-flame-retardant tape wrapping has high tensile strength and wear resistance, and still has certain insulation performance under high temperature by relying on mica, the fluoroplastic sheath is used as the protective sleeve, has excellent high temperature resistance, corrosion resistance and wear resistance, can resist chemical corrosion, acid, alkali, organic solvents and other media, and ensures the safe use of the cable line. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structure diagram of a high-temperature-resistant sensor cable of the utility model Figure One .

[0017] Figure 2 is a structure diagram of a high-temperature-resistant sensor cable of the utility model Figure Two .

[0018] Figure 3 is a half cut structure diagram of a high-temperature-resistant sensor cable of the utility model.

[0019] As shown in the figure: 1, oxygen-free copper conductor, 2, insulation layer, 3, sheath, 4, core group, 5, shielding layer, 6, through hole, 7, fireproof layer, 8, low-smoke halogen-free high-flame-retardant tape wrapping, 9, support layer, 10, metal strip, 11, non-metallic central reinforcing member, 12, filler. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model, apparently, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments; based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0021] Embodiment one

[0022] Combined with the attached Figure 1 and Figure 2The application relates to a high-temperature-resistant sensor cable, which comprises an oxygen-free copper conductor 1, an insulating layer 2 and a sheath 3, the sheath 3 has four groups of wire core groups 4 in annular array, the wire core groups 4 are collectively wrapped with low-smoke halogen-free high-flame-retardant tape wrapping 8, the low-smoke halogen-free high-flame-retardant tape wrapping 8 can be wrapped with mica tape in specific implementation, a supporting layer 9 is filled in the gap between the partial shielding layer 5 and the low-smoke halogen-free high-flame-retardant tape wrapping 8, the supporting layer 9 comprises a non-metallic central reinforcing element 11 arranged at the center of the wire core group 4, the non-metallic central reinforcing element 11 is tangent to the outer wall of the wire core group 4, a filler 12 is arranged in the gap between the adjacent partial shielding layer 5 and the low-smoke halogen-free high-flame-retardant tape wrapping 8, the filler 12 is any one of a polypropylene rope, a glass fiber rope or an asbestos rope, a metal tape 10 with a shielding function is arranged outside the low-smoke halogen-free high-flame-retardant tape wrapping 8, the metal tape 10 is a copper tape or a stainless steel tape, a threaded groove is arranged on the outer wall of the metal tape 10, and the sheath 3 outside the metal tape 10 is made of fluoroplastic which can resist 200 DEG C high temperature. The fluoroplastic refers to plastic made of fluororesin, and main varieties include polytetrafluoroethylene, tetrafluoroethylene-ethylene copolymer, tetrafluoroethylene-hexafluoropropylene copolymer and trifluorochloroethylene-ethylene copolymer.

[0023] Through the above-mentioned structure of the four groups of wire core groups 4, the supporting layer, the low-smoke halogen-free high-flame-retardant tape wrapping, the metal tape and the fluoroplastic sheath, the cable can still ensure safe work of the cable in a high-temperature environment, can shield external signals, is convenient for insulation, prevents electric leakage and avoids interference caused by control signals in the cable.

[0024] In combination with the accompanying drawings, Figure 1 and Figure 2 The wire core group 4 comprises a partial shielding layer 5, the partial shielding layer 5 is a braided tape made of stainless steel or copper, the wrapping rate of the partial shielding layer 5 is not less than 90%, two groups of oxygen-free copper conductors 1 are arranged in the partial shielding layer 5, the insulating layer 2 is made of polypropylene and is extruded on the oxygen-free copper conductor 1, the insulating layer 2 is arranged tangent to the insulating layer 2 and the partial shielding layer 5, a fireproof layer 7 is filled between the insulating layer 2 and the partial shielding layer 5, the fireproof layer 7 is magnesium oxide powder, and transparent wrapping tape is arranged between the fireproof layer 7 and the partial shielding layer 5 to prevent powder from escaping.

[0025] The partial shielding layer composed of the metal braided tape can shield environmental signal interference, the polypropylene insulating layer is convenient for wire core insulation, is more environmentally friendly and energy-saving compared with a traditional polyethylene insulating layer 2, the magnesium oxide fireproof layer 7 reduces the possibility of deformation of the cable in a high-temperature environment, improves the fire resistance of the wire core group and avoids fire or explosion of the wire core caused by heating.

[0026] Example two

[0027] On the basis of example one, in combination with the accompanying drawings, Figure 3The non-metallic central reinforcing member 11 is provided with a through hole 6 for the cooling liquid to pass through.

[0028] The through hole 6 facilitates heat dissipation inside the cable.

[0029] The specific use method is as follows:

[0030] The conductors can realize data communication. The at least two groups of oxygen-free copper conductors 1 in the shielding layer 5 can be arranged in parallel. Compared with the twisted pair wire, the conductor length is shorter, the signal receives less conduction loss and medium loss under the same transmission distance.

[0031] The polypropylene insulation layer 2 can isolate the conductors, has excellent electrical insulation performance, a high dielectric coefficient that increases with temperature, and a high breakdown voltage. Compared with the traditional polyethylene insulation layer 2, the process is simpler without crosslinking, which reduces carbon dioxide emissions and is more environmentally friendly and energy-saving.

[0032] The magnesium oxide powder as the fireproof layer 7 can utilize the chemical stability, insulation performance and fire resistance of magnesium oxide to reduce the electrical conductivity of the cable at high temperatures, thereby improving the safety performance of the cable and ensuring the normal operation of the wire and cable and preventing the wire and cable from easily exploding or catching fire due to heat.

[0033] The shielding layer 5 and the metal band 10 are arranged in double layers to shield external signals and avoid interference with the communication of the oxygen-free copper conductors 1. The shielding layer 5 formed by the stainless steel or copper braid can filter external signals. In addition, if the insulation layer 2 is damaged during use, the shielding layer can guide the leaked current to the grounding wire, thereby playing a certain safety protection role. Furthermore, the cable can have a certain degree of bending radius during installation. The metal band 10 has a threaded groove structure, which allows the cable to have a certain degree of bending radius during installation.

[0034] The support layer 9 makes the cable more round and stable in structure, increases the impact resistance and extrusion resistance of the cable, and the non-metallic central reinforcing member 11 supports the wire core groups 4. The through hole 6 facilitates the provision of cooling liquid to the inside of the cable to reduce the temperature of the cable under high temperature, thereby realizing higher transmission efficiency and improving communication services. The polypropylene rope, glass fiber rope or asbestos rope is a non-hygroscopic material and is not conductive, which has the functions of water resistance and fire resistance while ensuring the roundness of the cable.

[0035] The mica wrapping tape has high tensile strength and wear resistance, can support the support layer and still has certain insulation performance under high temperature by virtue of the mica, and prevents leakage or short circuit between wires;

[0036] The fluoroplastic sheath 3 has excellent high-temperature resistance, corrosion resistance and wear resistance, can resist chemical corrosion, acid, alkali, organic solvent and other media erosion, and ensures safe use of the cable line.

[0037] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0038] Although the embodiments of the present application have been shown and described, it is to be understood that for the purpose of the present application, the embodiments change, modify, replace, and vary in many ways without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

[0039] The above describes the present application and its embodiments, which are not restrictive, and the embodiments shown in the drawings are only one of the embodiments of the present application, and the actual structure is not limited thereto. In summary, if a person skilled in the art is inspired by the present application, without departing from the creative purpose of the present application, without creative design, similar structure and embodiments of the technical scheme should belong to the protection scope of the present application.

Claims

1. A high-temperature resistant sensor cable, comprising an oxygen-free copper conductor (1), an insulation layer (2), and a sheath (3), characterized in that: The sheath (3) has a ring array of several core groups (4). Each core group (4) includes a sub-shielding layer (5). The sub-shielding layer (5) contains at least two groups of oxygen-free copper conductors (1). The insulation layer (2) is made of polypropylene and is extruded over the oxygen-free copper conductors (1). A fireproof layer (7) is filled between the insulation layer (2) and the sub-shielding layer (5). The core groups (4) are covered with a low-smoke halogen-free high flame-retardant tape wrap (8). A support layer (9) is filled in the gap between the sub-shielding layer (5) and the low-smoke halogen-free high flame-retardant tape wrap (8). A metal strip (10) with shielding function is provided outside the low-smoke halogen-free high flame-retardant tape wrap (8). The sheath (3) outside the metal strip (10) is made of fluoroplastic that can withstand high temperatures of 200°C.

2. The high-temperature resistant sensor cable according to claim 1, characterized in that: The sub-shielding layer (5) is a braided strip made of stainless steel or copper, and the coverage of the sub-shielding layer (5) is not less than 90%.

3. The high-temperature resistant sensor cable according to claim 1, characterized in that: The metal strip (10) is a copper strip or a stainless steel strip, and the outer wall of the metal strip (10) is provided with a threaded groove.

4. The high-temperature resistant sensor cable according to claim 1, characterized in that: The fireproof layer (7) is magnesium oxide powder.

5. A high-temperature resistant sensor cable according to claim 1, characterized in that: The support layer (9) includes a non-metallic central reinforcement (11) located at the center of the core group (4). A filler (12) is provided in the gap between the adjacent shielding layer (5) and the low-smoke halogen-free high flame-retardant tape wrapping (8). The filler (12) is any one of polypropylene rope, glass fiber rope or asbestos rope.

6. A high-temperature resistant sensor cable according to claim 5, characterized in that: The non-metallic central reinforcement (11) is provided with a through hole (6) for coolant to pass through.

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